From f07a4c844da9f0ecae5bbee1ab94be56505f26f7 Mon Sep 17 00:00:00 2001 From: Thomas Bushnell Date: Tue, 25 Feb 1997 21:28:37 +0000 Subject: Initial source --- i386/i386at/gpl/linux/net/ni65.c | 648 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 648 insertions(+) create mode 100644 i386/i386at/gpl/linux/net/ni65.c (limited to 'i386/i386at/gpl/linux/net/ni65.c') diff --git a/i386/i386at/gpl/linux/net/ni65.c b/i386/i386at/gpl/linux/net/ni65.c new file mode 100644 index 0000000..44a5811 --- /dev/null +++ b/i386/i386at/gpl/linux/net/ni65.c @@ -0,0 +1,648 @@ +/* + * ni6510 (am7990 'lance' chip) driver for Linux-net-3 by MH + * Alphacode v0.33 (94/08/22) for 1.1.47 (or later) + * + * ---------------------------------------------------------- + * WARNING: DOESN'T WORK ON MACHINES WITH MORE THAN 16MB !!!! + * ---------------------------------------------------------- + * + * copyright (c) 1994 M.Hipp + * + * This is an extension to the Linux operating system, and is covered by the + * same Gnu Public License that covers the Linux-kernel. + * + * comments/bugs/suggestions can be sent to: + * Michael Hipp + * email: mhipp@student.uni-tuebingen.de + * + * sources: + * some things are from the 'ni6510-packet-driver for dos by Russ Nelson' + * and from the original drivers by D.Becker + */ + +/* + * Nov.18: multicast tweaked (AC). + * + * Aug.22: changes in xmit_intr (ack more than one xmitted-packet), ni65_send_packet (p->lock) (MH) + * + * July.16: fixed bugs in recv_skb and skb-alloc stuff (MH) + */ + +/* + * known BUGS: 16MB limit + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "ni65.h" + +/************************************ + * skeleton-stuff + */ + +#ifndef HAVE_PORTRESERVE +#define check_region(ioaddr, size) 0 +#define request_region(ioaddr, size,name) do ; while (0) +#endif + +#ifndef NET_DEBUG +#define NET_DEBUG 2 +#endif +/* +static unsigned int net_debug = NET_DEBUG; +*/ + +#define NI65_TOTAL_SIZE 16 + +#define SA_ADDR0 0x02 +#define SA_ADDR1 0x07 +#define SA_ADDR2 0x01 +#define CARD_ID0 0x00 +#define CARD_ID1 0x55 + +/*****************************************/ + +#define PORT dev->base_addr + +#define RMDNUM 8 +#define RMDNUMMASK 0x6000 /* log2(RMDNUM)<<13 */ +#define TMDNUM 4 +#define TMDNUMMASK 0x4000 /* log2(TMDNUM)<<13 */ + +#define R_BUF_SIZE 1518 +#define T_BUF_SIZE 1518 + +#define MEMSIZE 8+RMDNUM*8+TMDNUM*8 + +#define L_DATAREG 0x00 +#define L_ADDRREG 0x02 + +#define L_RESET 0x04 +#define L_CONFIG 0x05 +#define L_EBASE 0x08 + +/* + * to access the am7990-regs, you have to write + * reg-number into L_ADDRREG, then you can access it using L_DATAREG + */ +#define CSR0 0x00 +#define CSR1 0x01 +#define CSR2 0x02 +#define CSR3 0x03 + +/* if you #define NO_STATIC the driver is faster but you will have (more) problems with >16MB memory */ +#undef NO_STATIC + +#define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);inw(PORT+L_ADDRREG); \ + outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);} +#define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_ADDRREG),\ + inw(PORT+L_DATAREG)) +#define writedatareg(val) {outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);} + +static int ni65_probe1(struct device *dev,int); +static void ni65_interrupt(int irq, struct pt_regs *regs); + static void recv_intr(struct device *dev); + static void xmit_intr(struct device *dev); +static int ni65_open(struct device *dev); + static int am7990_reinit(struct device *dev); +static int ni65_send_packet(struct sk_buff *skb, struct device *dev); +static int ni65_close(struct device *dev); +static struct enet_statistics *ni65_get_stats(struct device *); + +static void set_multicast_list(struct device *dev); + +struct priv +{ + struct init_block ib; + void *memptr; + struct rmd *rmdhead; + struct tmd *tmdhead; + int rmdnum; + int tmdnum,tmdlast; + struct sk_buff *recv_skb[RMDNUM]; + void *tmdbufs[TMDNUM]; + int lock,xmit_queued; + struct enet_statistics stats; +}; + +int irqtab[] = { 9,12,15,5 }; /* irq config-translate */ +int dmatab[] = { 0,3,5,6 }; /* dma config-translate */ + +/* + * open (most done by init) + */ + +static int ni65_open(struct device *dev) +{ + if(am7990_reinit(dev)) + { + dev->tbusy = 0; + dev->interrupt = 0; + dev->start = 1; + return 0; + } + else + { + dev->start = 0; + return -EAGAIN; + } +} + +static int ni65_close(struct device *dev) +{ + outw(0,PORT+L_RESET); /* that's the hard way */ + dev->tbusy = 1; + dev->start = 0; + return 0; +} + +/* + * Probe The Card (not the lance-chip) + * and set hardaddress + */ + +int ni65_probe(struct device *dev) +{ + int *port, ports[] = {0x300,0x320,0x340,0x360, 0}; + int base_addr = dev->base_addr; + + if (base_addr > 0x1ff) /* Check a single specified location. */ + return ni65_probe1(dev, base_addr); + else if (base_addr > 0) /* Don't probe at all. */ + return ENXIO; + + for (port = ports; *port; port++) + { + int ioaddr = *port; + if (check_region(ioaddr, NI65_TOTAL_SIZE)) + continue; + if( !(inb(ioaddr+L_EBASE+6) == CARD_ID0) || + !(inb(ioaddr+L_EBASE+7) == CARD_ID1) ) + continue; + dev->base_addr = ioaddr; + if (ni65_probe1(dev, ioaddr) == 0) + return 0; + } + + dev->base_addr = base_addr; + return ENODEV; +} + + +static int ni65_probe1(struct device *dev,int ioaddr) +{ + int i; + unsigned char station_addr[6]; + struct priv *p; + + for(i=0;i<6;i++) + station_addr[i] = dev->dev_addr[i] = inb(PORT+L_EBASE+i); + + if(station_addr[0] != SA_ADDR0 || station_addr[1] != SA_ADDR1) + { + printk("%s: wrong Hardaddress \n",dev->name); + return ENODEV; + } + + if(dev->irq == 0) + dev->irq = irqtab[(inw(PORT+L_CONFIG)>>2)&3]; + if(dev->dma == 0) + dev->dma = dmatab[inw(PORT+L_CONFIG)&3]; + + printk("%s: %s found at %#3lx, IRQ %d DMA %d.\n", dev->name, + "network card", dev->base_addr, dev->irq,dev->dma); + + { + int irqval = request_irq(dev->irq, &ni65_interrupt,0,"ni65"); + if (irqval) { + printk ("%s: unable to get IRQ %d (irqval=%d).\n", + dev->name,dev->irq, irqval); + return EAGAIN; + } + if(request_dma(dev->dma, "ni65") != 0) + { + printk("%s: Can't request dma-channel %d\n",dev->name,(int) dev->dma); + free_irq(dev->irq); + return EAGAIN; + } + } + irq2dev_map[dev->irq] = dev; + + /* Grab the region so we can find another board if autoIRQ fails. */ + request_region(ioaddr,NI65_TOTAL_SIZE,"ni65"); + + p = dev->priv = (void *) kmalloc(sizeof(struct priv),GFP_KERNEL); + if (p == NULL) + return -ENOMEM; + memset((char *) dev->priv,0,sizeof(struct priv)); + + dev->open = ni65_open; + dev->stop = ni65_close; + dev->hard_start_xmit = ni65_send_packet; + dev->get_stats = ni65_get_stats; + dev->set_multicast_list = set_multicast_list; + + ether_setup(dev); + + dev->flags &= ~IFF_MULTICAST; + dev->interrupt = 0; + dev->tbusy = 0; + dev->start = 0; + + if( (p->memptr = kmalloc(MEMSIZE,GFP_KERNEL)) == NULL) { + printk("%s: Can't alloc TMD/RMD-buffer.\n",dev->name); + return EAGAIN; + } + if( (unsigned long) (p->memptr + MEMSIZE) & 0xff000000) { + printk("%s: Can't alloc TMD/RMD buffer in lower 16MB!\n",dev->name); + return EAGAIN; + } + p->tmdhead = (struct tmd *) ((( (unsigned long)p->memptr ) + 8) & 0xfffffff8); + p->rmdhead = (struct rmd *) (p->tmdhead + TMDNUM); + +#ifndef NO_STATIC + for(i=0;itmdbufs[i] = kmalloc(T_BUF_SIZE,GFP_ATOMIC)) == NULL) { + printk("%s: Can't alloc Xmit-Mem.\n",dev->name); + return EAGAIN; + } + if( (unsigned long) (p->tmdbufs[i]+T_BUF_SIZE) & 0xff000000) { + printk("%s: Can't alloc Xmit-Mem in lower 16MB!\n",dev->name); + return EAGAIN; + } + } +#endif + + for(i=0;irecv_skb[i] = dev_alloc_skb(R_BUF_SIZE)) == NULL) { + printk("%s: unable to alloc recv-mem\n",dev->name); + return EAGAIN; + } + if( (unsigned long) (p->recv_skb[i]->data + R_BUF_SIZE) & 0xff000000) { + printk("%s: unable to alloc receive-memory in lower 16MB!\n",dev->name); + return EAGAIN; + } + } + + return 0; /* we've found everything */ +} + +/* + * init lance (write init-values .. init-buffers) (open-helper) + */ + +static int am7990_reinit(struct device *dev) +{ + int i,j; + struct tmd *tmdp; + struct rmd *rmdp; + struct priv *p = (struct priv *) dev->priv; + + p->lock = 0; + p->xmit_queued = 0; + + disable_dma(dev->dma); /* I've never worked with dma, but we do it like the packetdriver */ + set_dma_mode(dev->dma,DMA_MODE_CASCADE); + enable_dma(dev->dma); + + outw(0,PORT+L_RESET); /* first: reset the card */ + if(inw(PORT+L_DATAREG) != 0x4) + { + printk("%s: can't RESET ni6510 card: %04x\n",dev->name,(int) inw(PORT+L_DATAREG)); + disable_dma(dev->dma); + free_dma(dev->dma); + free_irq(dev->irq); + return 0; + } + + /* here: memset all buffs to zero */ + + memset(p->memptr,0,MEMSIZE); + + p->tmdnum = 0; p->tmdlast = 0; + for(i=0;itmdhead + i; +#ifndef NO_STATIC + tmdp->u.buffer = (unsigned long) p->tmdbufs[i]; +#endif + tmdp->u.s.status = XMIT_START | XMIT_END; + } + + p->rmdnum = 0; + for(i=0;irmdhead + i; + rmdp->u.buffer = (unsigned long) p->recv_skb[i]->data; + rmdp->u.s.status = RCV_OWN; + rmdp->blen = -R_BUF_SIZE; + rmdp->mlen = 0; + } + + for(i=0;i<6;i++) + { + p->ib.eaddr[i] = dev->dev_addr[i]; + } + p->ib.mode = 0; + for(i=0;i<8;i++) + p->ib.filter[i] = 0; + p->ib.trplow = (unsigned short) (( (unsigned long) p->tmdhead ) & 0xffff); + p->ib.trphigh = (unsigned short) ((( (unsigned long) p->tmdhead )>>16) & 0x00ff) | TMDNUMMASK; + p->ib.rrplow = (unsigned short) (( (unsigned long) p->rmdhead ) & 0xffff); + p->ib.rrphigh = (unsigned short) ((( (unsigned long) p->rmdhead )>>16) & 0x00ff) | RMDNUMMASK; + + writereg(0,CSR3); /* busmaster/no word-swap */ + writereg((unsigned short) (((unsigned long) &(p->ib)) & 0xffff),CSR1); + writereg((unsigned short) (((unsigned long) &(p->ib))>>16),CSR2); + + writereg(CSR0_INIT,CSR0); /* this changes L_ADDRREG to CSR0 */ + + /* + * NOW, WE NEVER WILL CHANGE THE L_ADDRREG, CSR0 IS ALWAYS SELECTED + */ + + for(i=0;i<5;i++) + { + for(j=0;j<2000000;j++); /* wait a while */ + if(inw(PORT+L_DATAREG) & CSR0_IDON) break; /* init ok ? */ + } + if(i == 5) + { + printk("%s: can't init am7990, status: %04x\n",dev->name,(int) inw(PORT+L_DATAREG)); + disable_dma(dev->dma); + free_dma(dev->dma); + free_irq(dev->irq); + return 0; /* false */ + } + + writedatareg(CSR0_CLRALL | CSR0_INEA | CSR0_STRT); /* start lance , enable interrupts */ + + return 1; /* OK */ +} + +/* + * interrupt handler + */ + +static void ni65_interrupt(int irq, struct pt_regs * regs) +{ + int csr0; + struct device *dev = (struct device *) irq2dev_map[irq]; + + if (dev == NULL) { + printk ("net_interrupt(): irq %d for unknown device.\n", irq); + return; + } + + csr0 = inw(PORT+L_DATAREG); + writedatareg(csr0 & CSR0_CLRALL); /* ack interrupts, disable int. */ + + dev->interrupt = 1; + + if(csr0 & CSR0_ERR) + { + struct priv *p = (struct priv *) dev->priv; + + if(csr0 & CSR0_BABL) + p->stats.tx_errors++; + if(csr0 & CSR0_MISS) + p->stats.rx_errors++; + } + + if(csr0 & CSR0_RINT) /* RECV-int? */ + { + recv_intr(dev); + } + if(csr0 & CSR0_TINT) /* XMIT-int? */ + { + xmit_intr(dev); + } + + writedatareg(CSR0_INEA); /* reenable inter. */ + dev->interrupt = 0; + + return; +} + +/* + * We have received an Xmit-Interrupt .. + * send a new packet if necessary + */ + +static void xmit_intr(struct device *dev) +{ + int tmdstat; + struct tmd *tmdp; + struct priv *p = (struct priv *) dev->priv; + +#ifdef NO_STATIC + struct sk_buff *skb; +#endif + + while(p->xmit_queued) + { + tmdp = p->tmdhead + p->tmdlast; + tmdstat = tmdp->u.s.status; + if(tmdstat & XMIT_OWN) + break; +#ifdef NO_STATIC + skb = (struct sk_buff *) p->tmdbufs[p->tmdlast]; + dev_kfree_skb(skb,FREE_WRITE); +#endif + + if(tmdstat & XMIT_ERR) + { + printk("%s: xmit-error: %04x %04x\n",dev->name,(int) tmdstat,(int) tmdp->status2); + if(tmdp->status2 & XMIT_TDRMASK) + printk("%s: tdr-problems (e.g. no resistor)\n",dev->name); + + /* checking some errors */ + if(tmdp->status2 & XMIT_RTRY) + p->stats.tx_aborted_errors++; + if(tmdp->status2 & XMIT_LCAR) + p->stats.tx_carrier_errors++; + p->stats.tx_errors++; + tmdp->status2 = 0; + } + else + p->stats.tx_packets++; + + p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1); + if(p->tmdlast == p->tmdnum) + p->xmit_queued = 0; + } + + dev->tbusy = 0; + mark_bh(NET_BH); +} + +/* + * We have received a packet + */ + +static void recv_intr(struct device *dev) +{ + struct rmd *rmdp; + int rmdstat,len; + struct sk_buff *skb,*skb1; + struct priv *p = (struct priv *) dev->priv; + + rmdp = p->rmdhead + p->rmdnum; + while(!( (rmdstat = rmdp->u.s.status) & RCV_OWN)) + { + if( (rmdstat & (RCV_START | RCV_END)) != (RCV_START | RCV_END) ) /* is packet start & end? */ + { + if(rmdstat & RCV_START) + { + p->stats.rx_errors++; + p->stats.rx_length_errors++; + printk("%s: packet too long\n",dev->name); + } + rmdp->u.s.status = RCV_OWN; /* change owner */ + } + else if(rmdstat & RCV_ERR) + { + printk("%s: receive-error: %04x\n",dev->name,(int) rmdstat ); + p->stats.rx_errors++; + if(rmdstat & RCV_FRAM) p->stats.rx_frame_errors++; + if(rmdstat & RCV_OFLO) p->stats.rx_over_errors++; + if(rmdstat & RCV_CRC) p->stats.rx_crc_errors++; + rmdp->u.s.status = RCV_OWN; + printk("%s: lance-status: %04x\n",dev->name,(int) inw(PORT+L_DATAREG)); + } + else + { + len = (rmdp->mlen & 0x0fff) - 4; /* -4: ignore FCS */ + skb = dev_alloc_skb(R_BUF_SIZE); + if(skb != NULL) + { + if( (unsigned long) (skb->data + R_BUF_SIZE) & 0xff000000) { + memcpy(skb_put(skb,len),p->recv_skb[p->rmdnum]->data,len); + skb1 = skb; + } + else { + skb1 = p->recv_skb[p->rmdnum]; + p->recv_skb[p->rmdnum] = skb; + rmdp->u.buffer = (unsigned long) skb_put(skb1,len); + } + rmdp->u.s.status = RCV_OWN; + rmdp->mlen = 0; /* not necc ???? */ + skb1->dev = dev; + p->stats.rx_packets++; + skb1->protocol=eth_type_trans(skb1,dev); + netif_rx(skb1); + } + else + { + rmdp->u.s.status = RCV_OWN; + printk("%s: can't alloc new sk_buff\n",dev->name); + p->stats.rx_dropped++; + } + } + p->rmdnum++; p->rmdnum &= RMDNUM-1; + rmdp = p->rmdhead + p->rmdnum; + } +} + +/* + * kick xmitter .. + */ + +static int ni65_send_packet(struct sk_buff *skb, struct device *dev) +{ + struct priv *p = (struct priv *) dev->priv; + struct tmd *tmdp; + + if(dev->tbusy) + { + int tickssofar = jiffies - dev->trans_start; + if (tickssofar < 25) + return 1; + + printk("%s: xmitter timed out, try to restart!\n",dev->name); + am7990_reinit(dev); + dev->tbusy=0; + dev->trans_start = jiffies; + } + + if(skb == NULL) + { + dev_tint(dev); + return 0; + } + + if (skb->len <= 0) + return 0; + + if (set_bit(0, (void*)&dev->tbusy) != 0) + { + printk("%s: Transmitter access conflict.\n", dev->name); + return 1; + } + if(set_bit(0,(void*) &p->lock) != 0) + { + printk("%s: Queue was locked!\n",dev->name); + return 1; + } + + { + short len = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; + + tmdp = p->tmdhead + p->tmdnum; + +#ifdef NO_STATIC + tmdp->u.buffer = (unsigned long) (skb->data); + p->tmdbufs[p->tmdnum] = skb; +#else + memcpy((char *) (tmdp->u.buffer & 0x00ffffff),(char *)skb->data,skb->len); + dev_kfree_skb (skb, FREE_WRITE); +#endif + tmdp->blen = -len; + tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END; + + cli(); + p->xmit_queued = 1; + writedatareg(CSR0_TDMD | CSR0_INEA); /* enable xmit & interrupt */ + p->tmdnum++; p->tmdnum &= TMDNUM-1; + + if( !((p->tmdhead + p->tmdnum)->u.s.status & XMIT_OWN) ) + dev->tbusy = 0; + p->lock = 0; + sti(); + + dev->trans_start = jiffies; + + } + + return 0; +} + +static struct enet_statistics *ni65_get_stats(struct device *dev) +{ + return &((struct priv *) dev->priv)->stats; +} + +static void set_multicast_list(struct device *dev) +{ +} + +/* + * END of ni65.c + */ + -- cgit v1.2.3